CVE-2021-41282 Information

Description

diag_routes.php in pfSense 2.5.2 allows sed data injection. Authenticated users are intended to be able to view data about the routes set in the firewall. The data is retrieved by executing the netstat utility and then its output is parsed via the sed utility. Although the common protection mechanisms against command injection (i.e. the usage of the escapeshellarg function for the arguments) are used it is still possible to inject sed-specific code and write an arbitrary file in an arbitrary location.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://www.shielder.it/advisories/pfsense-remote-command-execution/ https://docs.netgate.com/pfsense/en/latest/releases/22-01_2-6-0.html https://www.shielder.it/advisories/ http://packetstormsecurity.com/files/166208/pfSense-2.5.2-Shell-Upload.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8